Dust repellant compositions
View Patent ↗Sprayable, liquid polymeric film-forming compositions containing an amount of an anti-static polymer that is effective to provide films formed from the composition with resistance to the deposition of dust, soil or grime on the surface thereof, wherein the surface tension of the liquid composition is less than about 25 milli-newtons per meter. Methods for preventing the accumulation of dust, soil or grime on surfaces such as a vehicle tire, wheel or wheel cover are also disclosed.
1. A method for preventing the accumulation of dust, soil or grime on a hard surface, comprising:
applying a layer of a liquid, water-based composition to said surface; and
drying said layer so that an anti-static polymeric film coating is formed thereon repellant to said dust, soil and grime;
wherein said liquid, water-based composition comprises:
(1) an anti-static component in an amount effective to provide said polymeric film with anti-static properties sufficient to resist dust, soil and grime accumulation, wherein said anti-static component consists of one or more compounds selected from the group consisting of:
(A) anti-static polymers that also contribute to lowering the surface tension of said liquid composition;
(B) wetting agents for lowering the surface tension of said liquid composition that also contribute anti-static properties to said polymeric film coating; and
(C) polymers that only contribute anti-static properties to said film coating;
(2) a surface tension-lowering component in an amount effective to lower the surface tension of said liquid composition below about 25 milli-newtons per meter, wherein said surface tension-lowering component comprises one or more compounds selected from the group consisting of:
(A) anti-static polymers that also contribute to lowering the surface tension of said liquid composition;
(B) wetting agents for lowering the surface tension of said liquid composition that also contribute anti-static properties to said polymeric film coating; and
(C) wetting agents that only contribute to lowering the surface tension of said liquid composition that also contribute anti-static properties to said polymeric film coating.
2. The method of claim 1 , wherein said hard surface is an automotive surface.
3. The method of claim 2 , wherein said automotive surface is a tire, wheel or wheel cover.
4. The method of claim 3 , wherein said dust is brake dust.
5. The method of claim 1 , wherein said surface is an optical surface.
6. The method of claim 1 , wherein said hard surface is a household surface.
7. The method of claim 1 , wherein said hard surface is an aircraft surface.
8. The method of claim 1 , wherein said liquid, water-based composition is a water-based emulsion.
9. The method of claim 1 , wherein said liquid, water-based composition is a water-based solution.
10. The method of claim 1 , wherein said liquid composition has a surface tension less than about 22 milli-newtons per meter.
11. The method of claim 1 , wherein said anti-static component or said surface tension-lowering component of said liquid composition comprises a wetting agent.
12. The method of claim 11 , wherein said wetting agent is a polymeric wetting agent.
13. The method of claim 1 , wherein said liquid composition further comprises a surface adhesion-promoting polymer.
14. The method of claim 13 , wherein said surface adhesion-promoting polymer is selected from the group consisting of polyacrylates, polyurethanes and cationic polymers.
15. The method of claim 1 , wherein said anti-static component of said liquid composition comprises a polar film-forming non-ionic polymer.
16. The method of claim 1 , wherein said anti-static component of said liquid composition comprises an anionic, amphoteric or zwitterionic polymer.
17. The method of claim 16 , wherein said anti-static component comprises an anionic fluorinated polymer.
18. The method of claim 17 , wherein said surface tension-lowering component is a silicone wetting agent.
19. The method of claim 18 , wherein said silicone wetting agent is a silicone carboxylate or silicone ester.
20. The method of claim 18 , wherein said liquid composition further comprises a surface adhesion-promoting polymer.
21. The method of claim 20 , wherein said surface adhesion-promoting polymer is a polyacyrlate.
22. The method of claim 1 , wherein said anti-static component and said surface tension-lowering component of said liquid composition both comprise the same anti-static polymer that also contributes to lowering the surface tension of said liquid composition.
23. The method of claim 1 , wherein said anti-static component and said surface tension-lowering component of said liquid composition both comprise the same wetting agent for lowering the surface tension of said liquid composition that also contributes anti-static properties to said polymeric film.
24. The method of claim 1 , wherein said anti-static component and said surface tension-lowering component of said liquid composition are both supplied by an anti-static polymer that also contributes to lowering the surface tension of said liquid composition.
25. The method of claim 1 , wherein said anti-static component and said surface tension-lowering component of said liquid composition are both supplied by a wetting agent for lowering the surface tension of said liquid composition that also contributes anti-static properties to said polymeric film.